While the service has new features and ways of navigating - for instance, the ribbon at the top of the screen with formatting tools has been hidden and there's a new touch screen setting - one of the biggest changes comes with how Office works across your devices.

However, the whole point of the new subscription model is that the software is constantly being updated, just like a website or app.

Office will still be available for $219.99 for those who just want to download it once. The Office 365 University edition will cost $79.99 for four years it can only be used on two machines and you can only renew at that price one time. Instead of buying Office flat-out as you did in the past, you will pay a $99.99 annual charge, which buys you automatic software updates, 20GB of extra storage on SkyDrive (Microsoft's Cloud storage service), 60 Skype world minutes and use of all the Office programs on up to five computers or tablets. Office 365 Home Premium, which includes such familiar programs as Microsoft Word, Excel, PowerPoint, OneNote and Access, will be offered with a yearly subscription fee. The new software package, dubbed Office 365, has a freshened look and feel, similar to that of Windows 8 - and offers a fresh way of paying for and using the programs as well. 29, 2013 — - After months of public testing, Microsoft is releasing the final version of Office 2013 today.

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